temperatures. 91 degrees today in oakland, 83 in san francisco. much cooler as we head into the end of the week. >> and that's your latest weather. >> thanks. now to tomorrow night's highly anticipated debate between president obama and mitt romney. today both candidates are hunkering down preparing for what could be a pivotal night. chuck todd is nbc's political director. he is in denver this morning where the debate will take place tomorrow. good morning to you. >> good morning, savannah. these candidates have each don four mock debates. they will each do one more today. it's more preparation than any two candidates have put into presidential debates in the modern era of presidential politics. >> i get the opportunity to introduce to you the next president of the united states governor mitt romney. >> mitt romney landed in colorado monday night with the endorsement of legend john elway. >> what an honor. what a welcome. what a colorado welcome. thank you so much. >> the governor's first and only event ahead of tomorrow's big presidential debate was at a packed air and space museum in denver.